linux-dev/tools/testing/selftests/ftrace/ftracetest, branch master

selftests/ftrace: Stop tracing while reading the trace file by default

2021-10-27T00:27:19Z

Stop tracing while reading the trace file by default, to prevent the test results while checking it and to avoid taking a long time to check the result. If there is any testcase which wants to test the tracing while reading the trace file, please override this setting inside the test case. This also recovers the pause-on-trace when clean it up. Link: https://lkml.kernel.org/r/163529053143.690749.15365238954175942026.stgit@devnote2 Signed-off-by: Masami Hiramatsu Signed-off-by: Steven Rostedt (VMware)

selftests/ftrace: Support ":README" suffix for requires

2020-06-16T16:42:47Z

Add ":README" suffix support for the requires list, so that the testcase can list up the required string for README file to the requires list. Note that the required string is treated as a fixed string, instead of regular expression. Also, the testcase can specify a string containing spaces with quotes. E.g. # requires: "place: [:]":README Signed-off-by: Masami Hiramatsu Reviewed-by: Tom Zanussi Signed-off-by: Shuah Khan

selftests/ftrace: Add "requires:" list support

2020-06-16T15:19:08Z

Introduce "requires:" list to check required ftrace interface for each test. This will simplify the interface checking code and unify the error message. Another good point is, it can skip the ftrace initializing. Note that this requires list must be written as a shell comment. Signed-off-by: Masami Hiramatsu Reviewed-by: Tom Zanussi Signed-off-by: Shuah Khan

selftests/ftrace: Allow ":" in description

2020-06-16T15:15:40Z

Allow ":" in the description line. Currently if there is ":" in the test description line, the description is cut at that point, but that was unintended. Signed-off-by: Masami Hiramatsu Reviewed-by: Tom Zanussi Signed-off-by: Shuah Khan

selftests/ftrace: Make XFAIL green color

2020-05-01T15:31:38Z

Since XFAIL (Expected Failure) is expected to fail the test, which means that test case works as we expected. IOW, XFAIL is same as PASS. So make it green. Signed-off-by: Masami Hiramatsu Acked-by: Steven Rostedt (VMware) Signed-off-by: Shuah Khan

ftrace/selftest: make unresolved cases cause failure if --fail-unresolved set

2020-05-01T15:26:51Z

Currently, ftracetest will return 1 (failure) if any unresolved cases are encountered. The unresolved status results from modules and programs not being available, and as such does not indicate any issues with ftrace itself. As such, change the behaviour of ftracetest in line with unsupported cases; if unsupported cases happen, ftracetest still returns 0 unless --fail-unsupported. Here --fail-unresolved is added and the default is to return 0 if unresolved results occur. Signed-off-by: Alan Maguire Acked-by: Masami Hiramatsu Acked-by: Steven Rostedt (VMware) Signed-off-by: Shuah Khan

ftrace/selftests: workaround cgroup RT scheduling issues

2020-05-01T15:25:39Z

wakeup_rt.tc and wakeup.tc tests in tracers/ subdirectory fail due to the chrt command returning: chrt: failed to set pid 0's policy: Operation not permitted. To work around this, temporarily disable grout RT scheduling during ftracetest execution. Restore original value on test run completion. With these changes in place, both tests consistently pass. Fixes: c575dea2c1a5 ("selftests/ftrace: Add wakeup_rt tracer testcase") Fixes: c1edd060b413 ("selftests/ftrace: Add wakeup tracer testcase") Signed-off-by: Alan Maguire Acked-by: Steven Rostedt (VMware) Signed-off-by: Shuah Khan

Merge tag 'trace-v5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

2019-07-18T18:51:00Z

Pull tracing updates from Steven Rostedt: "The main changes in this release include: - Add user space specific memory reading for kprobes - Allow kprobes to be executed earlier in boot The rest are mostly just various clean ups and small fixes" * tag 'trace-v5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (33 commits) tracing: Make trace_get_fields() global tracing: Let filter_assign_type() detect FILTER_PTR_STRING tracing: Pass type into tracing_generic_entry_update() ftrace/selftest: Test if set_event/ftrace_pid exists before writing ftrace/selftests: Return the skip code when tracing directory not configured in kernel tracing/kprobe: Check registered state using kprobe tracing/probe: Add trace_event_call accesses APIs tracing/probe: Add probe event name and group name accesses APIs tracing/probe: Add trace flag access APIs for trace_probe tracing/probe: Add trace_event_file access APIs for trace_probe tracing/probe: Add trace_event_call register API for trace_probe tracing/probe: Add trace_probe init and free functions tracing/uprobe: Set print format when parsing command tracing/kprobe: Set print format right after parsed command kprobes: Fix to init kprobes in subsys_initcall tracepoint: Use struct_size() in kmalloc() ring-buffer: Remove HAVE_64BIT_ALIGNED_ACCESS ftrace: Enable trampoline when rec count returns back to one tracing/kprobe: Do not run kprobe boot tests if kprobe_event is on cmdline tracing: Make a separate config for trace event self tests ...

ftrace/selftests: Return the skip code when tracing directory not configured in kernel

2019-07-16T19:14:47Z

If the kernel is not configured with ftrace enabled, the ftracetest selftests should return the error code of "4" as that is the kselftests "skip" code, and not "1" which means an error. To determine if ftrace is enabled, first the newer "tracefs" is searched for in /proc/mounts. If it is not found, then "debugfs" is searched for (as old kernels do not have tracefs). If that is not found, an attempt to mount the tracefs or debugfs is performed. This is done by seeing first if the /sys/kernel/tracing directory exists. If it does than tracefs is configured in the kernel and an attempt to mount it is performed. If /sys/kernel/tracing does not exist, then /sys/kernel/debug is tested to see if that directory exists. If it does, then an attempt to mount debugfs on that directory is performed. If it does not exist, then debugfs is not configured in the running kernel and the test exits with the skip code. If either mount fails, then a normal error is returned as they do exist in the kernel but something went wrong to mount them. This changes the test to always try the tracefs file system first as it has been in the kernel for some time now and it is better to test it if it is available instead of always testing debugfs. Link: http://lkml.kernel.org/r/20190702062358.7330-1-po-hsu.lin@canonical.com Reported-by: Po-Hsu Lin Acked-by: Masami Hiramatsu Signed-off-by: Steven Rostedt (VMware)

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 472

2019-06-19T15:09:11Z

Based on 1 normalized pattern(s): released under the terms of the gpl v2 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 5 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Allison Randal Reviewed-by: Enrico Weigelt Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081203.398003637@linutronix.de Signed-off-by: Greg Kroah-Hartman